G4074 - Gunson Colortune 14mm Fuel / Air Mixture Tester Kit The original tuning kit for understanding and adjusting the fuel/air mixture of your classic car. Allows you to see the combustion and adjust the mixture based on the colour shown on the...

G4053 - Gunson Carbalancer Solex SU Carburettor Carb Balancer Air Flow tool G4053 The fuel and air mix of an internal combustion engine is vital for efficient running and maximising power output. Performance of the engine is regulated by the flow of fuel...

G4055D - Gunson Hi Gauge & Colortune Plug Adaptor Kit 14mm Thread Long Reach G4055D A kit to convert the thread on the popular Gunson Colortune and Hi Gauge Compression Tester. Fits most sizes of modern spark plugs for modern and classic cars as well...

G4101 - Gunson Hi-Gauge Compression Tester G4101 The Gunson Hi-Gauge Compression Tester is designed to record the pressure created by the piston in each cylinder. This information can then be used to find faults in the valves, pistons, piston rings,...